I'm a huge fan of daily fruit consumption. One of the biggest mistakes I think people on low carb diets make is eliminating fruit from their diet. They are missing out on so many vitamins and antioxidants not found in most high fat, high protein foods. Pineapple in particular is high in vitamin C, thiamin and manganese. With pineapple you not only get fibre but bromelain (an enzyme that breaks down protein) and the fruit is relatively low in calories despite its reputation as being high in sugar. Remember sugar bound in the fibre of fruit isn't the same thing as table sugar.
If buying a simple kitchen gadget makes it easier for you to eat more fruit, then I say go ahead and shop. I bought mine on Amazon which you can find here. By the way, did you know it's National Nutrition Month in Canada? Well it is and you can find out more here on the Dieticians of Canada website.